EP 0746491 B1 19990623 - A HYDRAULIC CONTROL SYSTEM FOR WORK VEHICLES
Title (en)
A HYDRAULIC CONTROL SYSTEM FOR WORK VEHICLES
Title (de)
HYDRAULISCHES STEUERSYSTEM FÜR ARBEITSFAHRZEUGE
Title (fr)
SYSTEME DE COMMANDE HYDRAULIQUE POUR VEHICULES DE CHANTIER
Publication
Application
Priority
- DK 9500067 W 19950217
- DK 23294 A 19940225
Abstract (en)
[origin: DE4434532A1] A hydraulic control system (1) for work vehicles including a control unit (2) to control the steering wheels of a vehicle via a cylinder (3) and a priority valve (4) which by means of a first load-sensing system (LS1) controls the pressure fluid flow to the control unit (2) and to a subsequent proportional valve group (9a-9c). By means of a second load-sensing system (LS2) the proportional valve group (9a-9c) controls the pressure fluid flow to secondary hydraulic motors (10) or work cylinders (11, 12) to control the work tools of the vehicle. The control system (1) also includes an open-centre valve connection (6) and a fixed displacement pump (8). The first load-sensing system (LS1) is connected with a second load-sensing system (LS2), whereby drop-off of the pressure fluid flow to the control unit (2) is avoided at simultaneous operation of the latter and of one or several of the proportional valves (9a-9c) as it is the case with known control systems. Hereby a control system is provided which is particularly agreeable to operate for the driver of the work vehicle.
IPC 1-7
IPC 8 full level
B62D 5/07 (2006.01)
CPC (source: EP US)
B62D 5/07 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
DE 4434532 A1 19950831; DE 69510445 D1 19990729; DE 69510445 T2 20000224; EP 0746491 A1 19961211; EP 0746491 B1 19990623; US 5896943 A 19990427; WO 9523085 A1 19950831
DOCDB simple family (application)
DE 4434532 A 19940927; DE 69510445 T 19950217; DK 9500067 W 19950217; EP 95910452 A 19950217; US 69697796 A 19961023